Atmospheric pressure operated locking mechanism



INVENToHs 'rzle/man ATTRNEY.

Sept. 4, 1934. H. FRIEDMAN ET AL ATMOSPHERIC PRESSURE OPERATED LOCKING MECHANISM Filed May 18, 1933 Harry Ua VZ Hoch/mu? By Patented Sept. 4, 1934 STATES ATMOSPHERIC PRESSURE P E R A T E D LOCKING MECHANISM Harry Friedman and Carl Hochmuth, Vancouver, British Columbia, Canada Application May 18, 1933, Serial No.`6'71,728

In Canada January 26, 1933A f 3 Claims.

This invention relates to an atmospheric pressure locking system for application 'to automobiles and like vehicles whereby the car and its accessories are rendered immune to pilfering and stealing and tampering with its engine.

The present application is for improvements on our Patent No. 1,923,817 issued August 22, 1933, and has for one of its objects means for rendering the locking mechanism inoperative through the hand cranking or manual operation ci the engine.

The vacuum line is provided with a branch leading to the ignition lock which, When'open to shut oi the ignition circuit, opens the end of the vacuum line branch, thereby preventing the building up of a vacuinn in the line to cause the atmospheric pressure to operate the locks, but the moment the ignition circuit is closed by turning the key in the ignition lock such movement of the lock or key barrel closes the vacuum line.

Our invention will be more readily understood by reference to the specication and drawing accompanying and forming part of this application, in which:

Figure 1 is a composite View of an automobile showing where the locks may be applied on a car to the radiator ornament, engine hood, spare tire at the rear of the car, gasoline tank cap and spare wheel at the side of the car.

Figure 2 is a diagrammatic view of the motor showing the vacuum line connection to the intake manifold and branch from the vacuum line connected to the ignition switch by which the vacuum may be broken through operation of the switch key.

Figure 3 is a sectional view of the ignition switch lock connected to a valve mechanism used for making and breaking the Vacuum in the vacuurn line connecting the lock mechanisms.

Figure 4 is an end sectional View of the ignition switch taken on the line 4 4 of Figure 3 and shows the cam on the end of the key barrel in contact with the plunger of the valve displacing the ball off its seat thereby opening the valve and connected vacuum line to the atmosphere.

In the drawing like numerals indicate like parts throughout irrespective of the shape or form of the parts and the numeral l indicates a motor of an automobile, 2 the intake manifold thereto to which is attached the duct 3 having a branch 4 connected to the ignition switch 5 of the automobile.

The terminal connection of the branch 4 to the ignition switch 9 houses' a valve 6 having a (Cl. 'Y0-127 spring "I by which it is seated upon the seat 8 when not engaged by the plunger 9. f

The plunger 9 is in engagement with the earn r10 secured upon the end of the key barrel ll-of the ignition Yswitch 5 and lwhen the key barrel is into the face of the cam 10 that permits the valve to seat. i y

The branch 4, after it passes through the dash board 14 is encased in a section of heavily armoured cable 15 to prevent the branch'being cut in the event that unauthorized parties have f succeeded in obtaining entry to the car, in which event it would be possible to establish a partial vacuum in the duct 3 by manual operation of the engine after the branch is cut.

The duct 3 and branch 4 are usually of soft y copper tubing that can be easily punctured, hence the necessity in protecting it in exposed positions.

IThe duct 3 is extended and secured to the chassis frame of an automobile in any convenient manner and has branches connected thereto leading to atmospheric pressure operated locking mechanisms positioned in and about the automobile.

Figure 1, which is a composite view of an automobile, illustrates where it is possible and desirable to position and aiiiX such mechanisms and in this iigure a locking mechanism is indicated at A as secured to the radiator cap to prevent its removal as a valuable ornament may be secured thereto. Another locking mechanism is shown attached to the engine hood at B to prevent it being opened when the engine is stopped and the car parked. A bolt lock, is indicated at C as being used on the spare wheel to secure it to its carrying standard. Another lock, is indicated Yfro all in the open or inoperative po-sition and al1 parts of the car to which the locks are applied are free.

Having now described our invention what we claim and desire to be protected in' by Letters Patent, is:

1. In an atmospheric pressure-locking system for detachable parts of an automobile, a suction duct, a source of suction to which said duct is connected, atmospheric pressure operated suc' 'tion eiected locks for said detachable parts and connected with saidvduct, an ignition switch for the automobile engine and a Valvedevice cooperating with said yswitch'for connecting said duct with atmosphere to prevent action of atmospheric pressure on said locks when the switch is in the off position.

2. In an atmospheric pressure locking system for detachable parts of an automobile, a suction duct, a source of suction to which said duct is connected, atmospheric. pressure operated suction effected locks for said detachable parts and connected with said duct, an ignition switch for the automobiie engine and avalve device cooperating with said switch for connecting said duct with atmosphere to prevent action of atously tending to sea't said valve, and means actuv ated by the turning of said ignition lock to the 01T position for unseating said valve.

3. In an atmospheric pressure locking system for detachable parts of an automobile, a suction duct, a source of suction to which said duct is connected, atmospheric pressure operated suction eiected locks for said detachable parts and connected with said duct, an ignition switch for the automobile engine and a valve device cooperating with said switch for connecting said duct with atmosphere to prevent action ci atmospheric pressure on said locks when the switch is in the 01T position, said Valve device cornprising a body having a passage with a Valve seat, means connecting said duct with said body at one side of said seat, said body having ports communicating with the atmosphere at the other side of said valve seat, a valve, means continuously tending to seat said valve, and means actuated by the turning of saidv ignition lock to the ofi position for unseating said valve, said valve comprising ar ball, a plunger in said body for engaging said ball and a carn cooperating with said ignition lock and said ball for unseating said ball when said lock is turned to the off position.

' HARRY FRIEDMAN.

CARL HOCHMUTH.

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